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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// class std::ranges::subrange;
#include <ranges>
#include <cassert>
#include <cstddef>
#include "test_iterators.h"
using FI = forward_iterator<int*>;
FI fi{nullptr};
int *ptr = nullptr;
static_assert(std::same_as<decltype(std::ranges::subrange(fi, fi)),
std::ranges::subrange<FI, FI, std::ranges::subrange_kind::unsized>>);
static_assert(std::same_as<decltype(std::ranges::subrange(ptr, ptr, 0)),
std::ranges::subrange<int*, int*, std::ranges::subrange_kind::sized>>);
static_assert(std::same_as<decltype(std::ranges::subrange(ptr, nullptr, 0)),
std::ranges::subrange<int*, std::nullptr_t, std::ranges::subrange_kind::sized>>);
struct ForwardRange {
forward_iterator<int*> begin() const;
forward_iterator<int*> end() const;
};
template<>
inline constexpr bool std::ranges::enable_borrowed_range<ForwardRange> = true;
struct SizedRange {
int *begin();
int *end();
};
template<>
inline constexpr bool std::ranges::enable_borrowed_range<SizedRange> = true;
static_assert(std::same_as<decltype(std::ranges::subrange(ForwardRange())),
std::ranges::subrange<FI, FI, std::ranges::subrange_kind::unsized>>);
static_assert(std::same_as<decltype(std::ranges::subrange(SizedRange())),
std::ranges::subrange<int*, int*, std::ranges::subrange_kind::sized>>);
static_assert(std::same_as<decltype(std::ranges::subrange(SizedRange(), 8)),
std::ranges::subrange<int*, int*, std::ranges::subrange_kind::sized>>);
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